1 files changed, 149 insertions, 0 deletions

diff --git a/kernel/arch/s390/crypto/sha256_s390.c b/kernel/arch/s390/crypto/sha256_s390.c
new file mode 100644
index 000000000..b74ff1581
--- /dev/null
+++ b/kernel/arch/s390/crypto/sha256_s390.c
@@ -0,0 +1,149 @@
+/*
+ * Cryptographic API.
+ *
+ * s390 implementation of the SHA256 and SHA224 Secure Hash Algorithm.
+ *
+ * s390 Version:
+ *   Copyright IBM Corp. 2005, 2011
+ *   Author(s): Jan Glauber (jang@de.ibm.com)
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ */
+#include <crypto/internal/hash.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <crypto/sha.h>
+
+#include "crypt_s390.h"
+#include "sha.h"
+
+static int sha256_init(struct shash_desc *desc)
+{
+	struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
+
+	sctx->state[0] = SHA256_H0;
+	sctx->state[1] = SHA256_H1;
+	sctx->state[2] = SHA256_H2;
+	sctx->state[3] = SHA256_H3;
+	sctx->state[4] = SHA256_H4;
+	sctx->state[5] = SHA256_H5;
+	sctx->state[6] = SHA256_H6;
+	sctx->state[7] = SHA256_H7;
+	sctx->count = 0;
+	sctx->func = KIMD_SHA_256;
+
+	return 0;
+}
+
+static int sha256_export(struct shash_desc *desc, void *out)
+{
+	struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
+	struct sha256_state *octx = out;
+
+	octx->count = sctx->count;
+	memcpy(octx->state, sctx->state, sizeof(octx->state));
+	memcpy(octx->buf, sctx->buf, sizeof(octx->buf));
+	return 0;
+}
+
+static int sha256_import(struct shash_desc *desc, const void *in)
+{
+	struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
+	const struct sha256_state *ictx = in;
+
+	sctx->count = ictx->count;
+	memcpy(sctx->state, ictx->state, sizeof(ictx->state));
+	memcpy(sctx->buf, ictx->buf, sizeof(ictx->buf));
+	sctx->func = KIMD_SHA_256;
+	return 0;
+}
+
+static struct shash_alg sha256_alg = {
+	.digestsize	=	SHA256_DIGEST_SIZE,
+	.init		=	sha256_init,
+	.update		=	s390_sha_update,
+	.final		=	s390_sha_final,
+	.export		=	sha256_export,
+	.import		=	sha256_import,
+	.descsize	=	sizeof(struct s390_sha_ctx),
+	.statesize	=	sizeof(struct sha256_state),
+	.base		=	{
+		.cra_name	=	"sha256",
+		.cra_driver_name=	"sha256-s390",
+		.cra_priority	=	CRYPT_S390_PRIORITY,
+		.cra_flags	=	CRYPTO_ALG_TYPE_SHASH,
+		.cra_blocksize	=	SHA256_BLOCK_SIZE,
+		.cra_module	=	THIS_MODULE,
+	}
+};
+
+static int sha224_init(struct shash_desc *desc)
+{
+	struct s390_sha_ctx *sctx = shash_desc_ctx(desc);
+
+	sctx->state[0] = SHA224_H0;
+	sctx->state[1] = SHA224_H1;
+	sctx->state[2] = SHA224_H2;
+	sctx->state[3] = SHA224_H3;
+	sctx->state[4] = SHA224_H4;
+	sctx->state[5] = SHA224_H5;
+	sctx->state[6] = SHA224_H6;
+	sctx->state[7] = SHA224_H7;
+	sctx->count = 0;
+	sctx->func = KIMD_SHA_256;
+
+	return 0;
+}
+
+static struct shash_alg sha224_alg = {
+	.digestsize	=	SHA224_DIGEST_SIZE,
+	.init		=	sha224_init,
+	.update		=	s390_sha_update,
+	.final		=	s390_sha_final,
+	.export		=	sha256_export,
+	.import		=	sha256_import,
+	.descsize	=	sizeof(struct s390_sha_ctx),
+	.statesize	=	sizeof(struct sha256_state),
+	.base		=	{
+		.cra_name	=	"sha224",
+		.cra_driver_name=	"sha224-s390",
+		.cra_priority	=	CRYPT_S390_PRIORITY,
+		.cra_flags	=	CRYPTO_ALG_TYPE_SHASH,
+		.cra_blocksize	=	SHA224_BLOCK_SIZE,
+		.cra_module	=	THIS_MODULE,
+	}
+};
+
+static int __init sha256_s390_init(void)
+{
+	int ret;
+
+	if (!crypt_s390_func_available(KIMD_SHA_256, CRYPT_S390_MSA))
+		return -EOPNOTSUPP;
+	ret = crypto_register_shash(&sha256_alg);
+	if (ret < 0)
+		goto out;
+	ret = crypto_register_shash(&sha224_alg);
+	if (ret < 0)
+		crypto_unregister_shash(&sha256_alg);
+out:
+	return ret;
+}
+
+static void __exit sha256_s390_fini(void)
+{
+	crypto_unregister_shash(&sha224_alg);
+	crypto_unregister_shash(&sha256_alg);
+}
+
+module_init(sha256_s390_init);
+module_exit(sha256_s390_fini);
+
+MODULE_ALIAS_CRYPTO("sha256");
+MODULE_ALIAS_CRYPTO("sha224");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("SHA256 and SHA224 Secure Hash Algorithm");